Staple



Patented Oct. 8, 1935 UNITED -sTATEs PATENT UFFICE STAPLE Max Vogel. Frankfort-on-the-Main. Germany, assignor to The E. H. Hotchkiss Company, Norwalk, Conn., a corporation of Connecticut Original application November. 14, 1932, Serial No. $42,438.l Divided and this application July 18, 1933, Serial No. 680,937

2 Claims. (Cl. 85-49) Such shoulders were necessary since the staples 25 may be fully illustrated.

In the drawing: Fig. 1 is a side elevational view illustrating a desk type stapling machine;

Fig. 2 is a sectional view ytaken substantially 30 along the line2-2 of Fig. 1;

Fig. 3 is a sectional viewtaken substantially along the line 3--3 of Fig. 2;

Fig. 4 is a view similar to Fig. 3 but withthe staple driving plunger depressed; 35 Fig. 5 is a front elevational view of the machine,

the cover plate being omitted;

Fig. 6 isa somewhat similar view but with the staple driving blade also omitted;

Fig. 7 is a front view of the improved staple or 40 of a strip of such staples;and

Fig. 8 is a side view of a strip of the staples of Fig. 7.

' Referring in detail to the drawing, the stapling machine shown includes a frame I bent up of one piece and mounting a staple carrier or guide bar 2 articulated to thehinged block l of a base l. The staple driving means is attached to the frame I by being mounted in channels 5 bent or formed w by bending the front end of the machine. This ports staple driving means in spaced relation to the anvil.

The staples IS-may be fed forwardly along the guide bar 2 by any suitable or known means as,

for example, the follower I6 having ears 16a 5 mounting it on the removable guide rod Il'. A

spring 24 on such rod normally presses the follower forwardly against the staples so as to urge them toward the driving means and the staples may be loose or adhered in the form of a strip as 10 by any suitable cement.

According to the present invention the shanks I8 and I9 of the staples are inclined toward one another and the backs 20 of the staples are arched as best shown in Figs. 5 and 7. As will later ap- 15 pear, the staples shanks are in each instance straightened or moved into parallel relation prior to the driving of the staple and it is preferred that the length of the arch correspond to the distance between the staple shanks when the 20 shanks are shifted into parallel relation.

To accommodate the staples I5 the carrier or guide bar 2 is under-cut or provided with side walls which incline outwardly and upwardly (see Figs. 5 and 6) whereby when the staples are 25 passed ontc the guide bar from the vouter end thereof, the staple Shanks extend parallel with the side walls of the guide bar and the upper edges of the latter are farther apart than the lower edges thereof. With this arrangement the staples can- 3o notinvoluntarily rise with respect to the guide bar and there is no necessity for any particular arrangement of guide or guard means to hold the staples down on the guide bar.V -At its end toward the driving means the guide bar ls closed as by se plate I2 the surface' of which, looking toward the staple back, is flat.

From the foregoing it will be understood that the staples have their shanks inclined toward one another as shown in Fig. 7 when the staples are 40 positioned on the guide bar 2. Prior to the drivingl of the staples their shanks must be shifted into parallelrelation or into positions at right angles to the back 2l. l To this end a remmer 2| is disposed in the rear of the driver 1 and secured to the plunger rod I 0 by a screw 22. Laterally, such rammer is guided in a slot in a gauge plate 23 located between the cover plate II and the supportingl plate I.

'i'he staples II are fed one at a timeinto a race- Il) way through which the driver 'I is operable and the rammer 2| of course moves with said driver. As the driver moves downwardly on its working stroke the staple following themone in the raceway isundertherammeril andthelatterstrlkesthc Il 2 arched back of the staple (Figs. 4 and 6) This causes the shanks of the staple struck by the :animer to straighten or move into parallel relation and the staple so struck is then ready for driving and when the driver 'l returns to normal position the staple last struck by the rammer moves into the raceway beneath the driver.

When this occurs the next staple moves forward into position beneath the rammer and with its arched back against the rear lower portion of the driver (Fig. 5) and the driver maintains it in position. From this it will be clear that an arched 'staple cannot move into the raceway and since the staples are re-shaped by the rammer 2| only one at a time and as necessity arises it will be clear that but one staple at a time enters the raceway and that clogging of the staples in the raceway is avoided.

It will now be clear that with the commotion of staple here disclosed a machine for using such staples may be of extremely simple construction since such a machine need not include any guide preventing involuntary rising of the staples relative to the guide -bar and since the machine does not include any special means or any extra part serving to prevent a secondv staple entering the raceway when one staple is already in the raceway. Further, it is to be understood that the staple is not limited to use in a desk type stapling machine but may be used in other stapling devices 6 such as stapling pliers, stapling hammers, etc.

Having thus set forth the nature of my invention, what I claim is:

1. A wire staple for stapling devices, said staple including a connecting back and Shanks inclin- 10 ing toward one another, said connecting back being upwardly arched, said arched back adapted to be straightened before application of the staple, and said Shanks adapted to assume a parallel relationship when said arch is straightened. l5 2. A staple for stapling devices comprising a connecting back portion and side shanks normally inclined toward each other extending from the same side of the back, said baci: being arched in a direction away from the Shanks and adapted n y to be straightened before application of the staple, and said Shanks adapted to assume a substantially parallel relationship when said arch is straightened.

VOGEL. 

